Garmin 178c turns off on it's own.

I have a garmin 178c map sounder and it is about 3-4 years old. It seems to power up alright, sometimes it will stay on for a little while, and sometimes it will turn off immediately. Is this something i can fix myself either a wiring issue, connection issue or do they need servicing? Thank You

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I had the same problem with mine. It is caused by a crimped wire on the internal harness inside the machine. I opened it up and discovered that when originally put together 3 of the wires from the plug were crimped. One was broken off. The only way to fix it is to open it up, restrip the wires place a piece shrink wrap on before you solder it back and then make the shrink wrap flush with the back of the plug and heat her up. And, Voila... no more intermittent operation. Hope this helps? John

I had the same problem. In your settings you can set this thing to monitor your battery's power so it auto shut down if your battery goes below 11.2 volts or so. I disabled this and it has worked ever since.

I have the same problem. Did you ever figure out why it was not loading? There are no software adjustments to be made. Just plug in the card and wait. It says its reading the card, but never goes any further. Let it 'read the card' for hours with no luck. Help!!!